anonymous
  • anonymous
I'm pretty sure it would be a because it's a negative number but can someone confirm for a medal? Which of the following is irrational? -9 over 5 Square root of 5 7 over 3 Square root of 9
Mathematics
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Thank you. But since all the other ones are positive wouldn't the irrational number be the fraction negative 9 over 5
jim_thompson5910
  • jim_thompson5910
rational means you can write it as a fraction of two whole numbers rational numbers can be negative eg: -2/3
anonymous
  • anonymous
Ohhhh so the square root of 9 would be wrong

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jim_thompson5910
  • jim_thompson5910
that is equivalent to 3 which is the same as 3/1 sqrt(9) is rational since 3 is rational
anonymous
  • anonymous
But the square root of 5 don't have any whole numbers it would be like 2.5 so wouldn't that one be irrational?
jim_thompson5910
  • jim_thompson5910
sqrt(5) is irrational. there is no way to write it as a fraction of whole numbers
jim_thompson5910
  • jim_thompson5910
we can get approximations, but never the exact thing
anonymous
  • anonymous
Than you so much(:
jim_thompson5910
  • jim_thompson5910
you're welcome

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